
Meirril |
Healing abilities generally say what effect they have if they target undead. Dhampir are treated as undead for healing spells. The Vitalist's Collective Healing ability says the healing you divert retains all of its properties from the original source. Which means if you use Collective Healing to share a Cure Light Wounds with your Dhampir, it takes damage from your Collective Healing.
If you want to ask about a different psionic healing, mention the specific ability. The more specific you are the easier it is to answer questions.

miknick55 |
If you want to ask about a different psionic healing, mention the specific ability. The more specific you are the easier it is to answer questions.
Only using psionic healing, myself. No Cure Wounds spells or the like.
Natural Healing is the most often used psionic power. I have redistributed the healing from others drinking Cure Wounds potions, but not to the Dhampir, as I am aware that would damage him.
Natural Healing (1st level Vitalist power):
https://www.d20pfsrd.com/alternative-rule-systems/psionics-unleashed/psioni c-powers/n/natural-healing
I'm not trying to over-complicate things, but the people I play with are definitely sticklers about the rules, which is fine by me.
Seems as worded that is isn't positive.
Thank you!

VoodistMonk |

Do Dhampir naturally heal in any way? If yes, you accelerate that healing... it works on Dhampir.
If Dhampir do not heal naturally over time, then there is nothing to accelerate, and it wouldn't work.
Given that there is nothing in their description saying Dhampir DON'T heal naturally, your Vitalist healing works via accelerating whatever healing they do naturally do.
It works on Dhampir.

Meirril |
Do Dhampir naturally heal in any way? If yes, you accelerate that healing... it works on Dhampir.
If Dhampir do not heal naturally over time, then there is nothing to accelerate, and it wouldn't work.
This is a strange case. Natural Healing is Personal, but Communal Healing allows the Vitalist to move the healing to others. Since natural healing doesn't specify that it harms undead, it doesn't. Dhampirs do benefit from natural healing so there is no conflict there.
There could be an argument made that creatures that don't benefit from natural healing like actual undead and constructs shouldn't benefit from the Vitalist's natural healing, but its not absolutely clear in my mind that it shouldn't work.